JPH077449B2 - Object number detector - Google Patents

Object number detector

Info

Publication number
JPH077449B2
JPH077449B2 JP62279929A JP27992987A JPH077449B2 JP H077449 B2 JPH077449 B2 JP H077449B2 JP 62279929 A JP62279929 A JP 62279929A JP 27992987 A JP27992987 A JP 27992987A JP H077449 B2 JPH077449 B2 JP H077449B2
Authority
JP
Japan
Prior art keywords
coordinates
calculation unit
coordinate
objects
image
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP62279929A
Other languages
Japanese (ja)
Other versions
JPH01121978A (en
Inventor
茂 ▲高▼木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP62279929A priority Critical patent/JPH077449B2/en
Publication of JPH01121978A publication Critical patent/JPH01121978A/en
Publication of JPH077449B2 publication Critical patent/JPH077449B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は対象物数検出装置に関し、特に複数台のテレビ
ジョンカメラ(以下「テレビカメラ」と称す)を設置し
てエレベータ乗場、エレベータかご内等にいる人の数を
検出するに好適な対象物数検出装置に関する。
Description: TECHNICAL FIELD The present invention relates to an object number detection device, and in particular, a plurality of television cameras (hereinafter referred to as “television cameras”) are installed in an elevator hall or an elevator car. The present invention relates to a device for detecting the number of objects, which is suitable for detecting the number of people in the same place.

〔従来の技術〕[Conventional technology]

テレビカメラの映像信号をデジタル信号に変換し、得ら
れたデジタル信号画像から検出対象画像を認識する手法
は広く使用されている。実開昭53−56676号公報にはか
かる手法によりエレベータ乗場やかご内の人数を検出す
る技術が開示されている。
A method of converting a video signal of a television camera into a digital signal and recognizing a detection target image from the obtained digital signal image is widely used. Japanese Utility Model Application Laid-Open No. 53-56676 discloses a technique for detecting the number of people in an elevator hall or a car by such a method.

この方法によれば、エレベータ乗場やかご内を1台のテ
レビカメラで撮像し、得られた映像信号を処理するもの
であった。したがって、監視面積が比較的狭い場合や、
天井が高くて1台のテレビカメラで間に合う場合にはこ
の技術をそのまま利用できた。
According to this method, the image of the elevator hall or the inside of the car is picked up by one TV camera, and the obtained video signal is processed. Therefore, if the monitoring area is relatively small,
If the ceiling was high and one TV camera was enough, this technique could be used.

〔発明が解決しようとする問題点〕[Problems to be solved by the invention]

ところがテレビカメラを用い監視するとき、天井が低い
ためにテレビカメラを低い位置に取付けざるを得ない場
合や、監視領域が広い場合には複数台のテレビカメラを
設置しなければならないことが起こる。このような状況
においては死角ができないように視野の一部が重なるよ
うにテレビカメラを設置する。
However, when monitoring using a TV camera, it may be necessary to install a plurality of TV cameras if the TV camera has to be installed at a low position because of a low ceiling or if the monitoring area is wide. In such a situation, the TV camera is installed so that the fields of view overlap so that no blind spots occur.

上上述した従来の人数検出装置においては、1台のテレ
ビジョンカメラの映像信号を処理してぞれぞれ人数を検
出できるけれども、視野の一部が重なるように配置され
た場合には重複部分を重ねて検出することから監視領域
全体の正確な人数の検出ができないという問題点があっ
た。
In the above-described conventional number-of-people detecting device, the number of people can be detected by processing the video signals of one television camera, but if they are arranged so that their visual fields partially overlap each other, an overlapping portion will occur. There is a problem in that it is not possible to accurately detect the number of people in the entire monitoring area because the detections are overlapped.

本発明は上記の問題点を解決するためになされたもの
で、視野の一部が重なるように複数台のテレビジョンカ
メラを設置した場合でも、監視領域全体の人数を高精度
で検出することのできる人数検出装置を得ることを目的
とする。
The present invention has been made to solve the above-described problems, and it is possible to detect the number of people in the entire monitoring area with high accuracy even when a plurality of television cameras are installed so that their fields of view overlap. The purpose is to obtain a device for detecting the number of people who can.

〔問題点を解決するための手段〕[Means for solving problems]

本発明に係る対象物数検出装置は、床面に対する位置関
係が予め設定されていると共に、相互の視野の一部が重
なるように配置された複数台のテレビジョンカメラの映
像信号をそれぞれデジタル信号に変換し、得られたデジ
タル信号画像から対象物画像を抽出して上記テレビジョ
ンカメラの全視野内の対象物の数を検出する対象物数検
出装置において、上記複数のテレビジョンカメラの視野
の座標系毎に、当該座標系に対応するテレビジョンカメ
ラの画像から検出された対象物画像の内、上記視野の座
標系における対象物画像の中心座標に近い座標を求める
座標算出部と、この座標算出部で求めた各座標が上記床
面の座標系で一致するかをそれぞれ比較し、一致した座
標数を算出する一致数算出部と、該一致数算出部の数値
を上記各テレビジョンカメラの検出した対象物の数の総
和から減算して対象物の数を補正する補正部とを備えて
いる。
The object number detection device according to the present invention is such that the positional relationship with respect to the floor surface is preset, and the video signals of a plurality of television cameras arranged so that their visual fields partially overlap each other are digital signals. In the object number detection device for detecting the number of objects in the entire field of view of the television camera by extracting the object image from the obtained digital signal image, the coordinate system of the fields of view of the plurality of television cameras A coordinate calculation unit that obtains, for each of the object images detected from the image of the television camera corresponding to the coordinate system, coordinates near the center coordinates of the object image in the coordinate system of the field of view, and the coordinate calculation unit. It is compared whether the respective coordinates obtained in step 1 are the same in the coordinate system of the floor surface, and the number of coincidence calculation part for calculating the number of coincident coordinates is calculated. And a correcting unit for correcting the number of objects by subtracting from the sum of the detected number of objects Nkamera.

〔作用〕[Action]

本発明によれば、相互に視野の重なる複数のテレビカメ
ラによって対象物を検出しても、その重なり部分におけ
る数を全テレビカメラの検出した数から減算補正し対象
物の数を正確に検出する。
According to the present invention, even if an object is detected by a plurality of TV cameras whose fields of view overlap each other, the number in the overlapping part is subtracted and corrected from the number detected by all the TV cameras to accurately detect the number of objects.

〔実施例〕〔Example〕

以下第1図、第2図に示す実施例に基づいて本発明を説
明する。第1図は本実施例装置の構成を示す図で、同図
において、(1a),(1b)はテレビカメラの映像信号を
入力してデジタル信号を出力する画像入力部、(2a),
(2b)は対象物(例えば人物)を抽出する対象物抽出
部、(3a),(3b)は抽出された対象物のテレビカメラ
の視野中心座標に最も近い座標を算出する座標算出部、
(4)は座標算出部(3a),(3b)で算出された座標値
をそれぞれ比較し、一致している対象物の数を算出する
一致数算出部、(5)は検出された対象物の総和から一
致数算出部(4)で算出された一致数を引算する補正部
である。
The present invention will be described below based on the embodiments shown in FIGS. 1 and 2. FIG. 1 is a diagram showing the configuration of the apparatus of this embodiment. In FIG. 1, (1a) and (1b) are image input sections for inputting a video signal of a television camera and outputting a digital signal, (2a),
(2b) is an object extraction unit that extracts an object (for example, a person), (3a), (3b) is a coordinate calculation unit that calculates the coordinates of the extracted object that are closest to the view center coordinates of the television camera,
(4) is a coincidence number calculation unit that compares the coordinate values calculated by the coordinate calculation units (3a) and (3b) and calculates the number of matching objects, and (5) is the total sum of detected objects. Is a correction unit that subtracts the number of matches calculated by the number of matches calculation unit (4).

以上のように構成された実施例装置を用いて対象物を検
出する方法を第2図に基づいて説明する。テレビジョン
カメラ(6a),(6b)はX軸方向(画面の左右方向)に
ずらして配置して、テレビカメラ(6a),(6b)の視野
(7a),(7b)が同図に示すように一部において重な
り、死角を生じないようにしている。両視野(7a),
(7b)が重なる部分に対象物(8)があると、床面上に
対象物(8)の投影(9a),(9b)を形成する。
A method for detecting an object using the embodiment apparatus configured as described above will be described with reference to FIG. The television cameras (6a) and (6b) are arranged so as to be displaced in the X-axis direction (left and right direction of the screen), and the visual fields (7a) and (7b) of the television cameras (6a) and (6b) are shown in the same figure. As shown in the figure, they do not overlap with each other and cause no blind spots. Both fields of view (7a),
When the object (8) is present at the portion where (7b) overlaps, projections (9a) and (9b) of the object (8) are formed on the floor surface.

然してテレビジョンカメラ(6a),(6b)からの映像信
号を画像入力部(1a),(1b)においてデジタル信号に
変換し、対象物抽出部(2a),(2b)に出力すると、対
象物抽出部(2a),(2b)は対象物(8)のみをそれぞ
れ投影(9a),(9b)として検出し、その検出信号を座
標算出部(3a),(3b)に出力する。座標算出部(3
a),(3b)は投影(9a),(9b)のうち各テレビジョ
ンカメラ(6a),(6b)の視野中心座標(10a),(10
b)に最も近い座標(Pa),(Pb)を算出し、その結果
を一致数算出部(4)に出力する。ここで座標(Pa),
(Pb)は対象物(8)の床面上の座標(P)を示す同一
点を表している。ここでテレビカメラ(6a)(6b)の床
面に対する位置関係を予め設定しておくことによって座
標(P)の投影(9a),(9b)に対応したデジタル画像
上の位置が自ずと決定する。従って座標算出部(3a),
(3b)からの入力により一致数算出部(4)はデジタル
画像上にある座標(Pa),(Pb)が一致するか否かを検
出し、一致した座標の数のみを算出して補正部(5)に
その算出結果を出力する。補正部(5)は一致数算出部
(4)からの数値を各テレビカメラ(6a),(6b)の検
出した対象物(8)の総和から引算し、重なり部におけ
る重複した対象物(8)の数を補正して本来の数に正し
て対象物(8)の数を算出する。
However, when the video signals from the television cameras (6a) and (6b) are converted into digital signals in the image input sections (1a) and (1b) and output to the object extraction sections (2a) and (2b), The extraction units (2a) and (2b) detect only the object (8) as projections (9a) and (9b), and output the detection signals to the coordinate calculation units (3a) and (3b). Coordinate calculator (3
a) and (3b) are projection center coordinates (10a), (10a), (10b) of the television cameras (6a), (6b) among the projections (9a), (9b).
The coordinates (Pa) and (Pb) closest to b) are calculated, and the result is output to the coincidence number calculation unit (4). Where coordinates (Pa),
(Pb) represents the same point indicating the coordinates (P) on the floor surface of the object (8). Here, by presetting the positional relationship between the television cameras (6a) and (6b) with respect to the floor surface, the positions on the digital image corresponding to the projections (9a) and (9b) of the coordinates (P) are automatically determined. Therefore, the coordinate calculation unit (3a),
Based on the input from (3b), the coincidence number calculation unit (4) detects whether or not the coordinates (Pa) and (Pb) on the digital image match, calculates only the number of coincident coordinates, and the correction unit The calculation result is output to (5). The correction unit (5) subtracts the numerical value from the coincidence number calculation unit (4) from the total sum of the objects (8) detected by the TV cameras (6a) and (6b), and the overlapping objects ( The number of 8) is corrected and corrected to the original number to calculate the number of objects (8).

以上本実施例によれば複数のテレビカメラで検出した対
象物のうち、重複して検出した数を補正することから、
正確な検出数を得ることができる。
As described above, according to the present embodiment, among the objects detected by the plurality of TV cameras, the number of duplicate detections is corrected,
An accurate detection number can be obtained.

[発明の効果] この発明によれば、床面に対する位置関係が予め設定さ
れていると共に、相互の視野の一部が重なるように配置
された複数台のテレビジョンカメラの映像信号をそれぞ
れデジタル信号に変換し、得られたデジタル信号画像か
ら対象物画像を抽出して上記テレビジョンカメラの全視
野内の対象物の数を検出する対象物数検出装置におい
て、上記複数台のテレビジョンカメラの各々の視野の座
標系毎に、当該座標系に対応するテレビジョンカメラの
画像から検出された対象物画像の内、上記視野の座標系
における中心座標に近い対象物画像の座標を求める座標
算出部と、この座標算出部で求めた各座標が上記床面の
座標系で一致するかをそれぞれ比較し、一致した座標数
を算出する一致数算出部と、該一致数算出部の数値を上
記複数台のテレビジョンカメラの各々の検出した対象物
の数の総和から減算して対象物の数を補正する補正部と
をとを備えたので、死角ができないように視野の一部が
重複するように複数台のテレビカメラを設置した場合で
あっても、重複部分を重ねて検出することがないため監
視領域の監視対象数を高精度で検出できるという効果が
ある。
[Effect of the Invention] According to the present invention, the positional relationship with respect to the floor surface is set in advance, and the video signals of a plurality of television cameras arranged so that their mutual visual fields partially overlap each other are digital signals. In the object number detection device for detecting the number of objects in the entire field of view of the television camera by extracting the object image from the obtained digital signal image, the field of view of each of the plurality of television cameras For each coordinate system, a coordinate calculation unit that obtains the coordinates of the object image close to the center coordinates in the coordinate system of the field of view among the object images detected from the image of the television camera corresponding to the coordinate system, and The respective coordinates obtained by the coordinate calculation unit are compared to see if they match in the coordinate system of the floor surface, and the number of coincidence calculation unit that calculates the number of coincident coordinates and the numerical value of the number of coincidence calculation unit It has a correction unit that corrects the number of objects by subtracting it from the total number of detected objects of each of several television cameras. Even if the television camera is installed, it is possible to detect the number of monitoring targets in the monitoring region with high accuracy because overlapping portions are not detected.

【図面の簡単な説明】[Brief description of drawings]

第1図は本発明に係る対象物数検出装置の一実施例を示
す構成図、第2図は検出状態を説明するための図であ
る。 図において、(3a),(3b)は座標算出部、(4)は一
致数算出部、(5)は補正部、(6a),(6b)はテレビ
カメラ、(8)は対象物、(9a),(9b)は投影のデジ
タル画像、(10a),(10b)は視野中心座標、(Pa),
(Pb)は視野中心座標に最も近い座標である。
FIG. 1 is a block diagram showing an embodiment of the object number detecting device according to the present invention, and FIG. 2 is a diagram for explaining a detection state. In the figure, (3a) and (3b) are a coordinate calculation unit, (4) is a matching number calculation unit, (5) is a correction unit, (6a) and (6b) are television cameras, (8) is an object, ( 9a) and (9b) are projected digital images, (10a) and (10b) are view center coordinates, (Pa),
(Pb) is the coordinate closest to the center coordinate of the visual field.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】床面に対する位置関係が予め設定されてい
ると共に、相互の視野の一部が重なるように配置された
複数台のテレビジョンカメラの映像信号をそれぞれデジ
タル信号に変換し、得られたデジタル信号画像から対象
物画像を抽出して上記テレビジョンカメラの全視野内の
対象物の数を検出する対象物数検出装置において、上記
複数台のテレビジョンカメラの各々の視野の座標系毎
に、当該座標系に対応するテレビジョンカメラの画像か
ら検出された対象物画像の内、上記視野の座標系におけ
る対象物画像の中心座標に近い座標を求める座標算出部
と、この座標算出部で求めた各座標が上記床面の座標系
で一致するかをそれぞれ比較し、一致した座標数を算出
する一致数算出部と、該一致数算出部の数値を上記複数
台のテレビジョンカメラの各々が検出した対象物の数の
総和から減算して対象物の数を補正する補正部とを備え
たことを特徴とする対象物数検出装置。
1. A positional relationship with respect to a floor is set in advance, and the video signals of a plurality of television cameras arranged so that their visual fields partially overlap each other are obtained by converting them into digital signals. In the object number detection device for extracting the object image from the digital signal image to detect the number of objects in the entire field of view of the television camera, for each coordinate system of the field of view of each of the plurality of television cameras, Among the object images detected from the image of the television camera corresponding to the coordinate system, the coordinate calculation unit that obtains the coordinates close to the center coordinates of the object image in the coordinate system of the field of view, and the coordinate calculation unit The coordinates of each coordinate are compared to see if they match in the coordinate system of the floor, and the number of coincidences calculation unit for calculating the number of coincident coordinates is calculated. Object number detecting device, each of La is characterized in that a correcting unit for correcting the number of objects is subtracted from the sum of the number of objects detected.
JP62279929A 1987-11-05 1987-11-05 Object number detector Expired - Lifetime JPH077449B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62279929A JPH077449B2 (en) 1987-11-05 1987-11-05 Object number detector

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62279929A JPH077449B2 (en) 1987-11-05 1987-11-05 Object number detector

Publications (2)

Publication Number Publication Date
JPH01121978A JPH01121978A (en) 1989-05-15
JPH077449B2 true JPH077449B2 (en) 1995-01-30

Family

ID=17617880

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62279929A Expired - Lifetime JPH077449B2 (en) 1987-11-05 1987-11-05 Object number detector

Country Status (1)

Country Link
JP (1) JPH077449B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4607394B2 (en) * 2001-09-27 2011-01-05 株式会社シー・イー・デー・システム Person detection system and person detection program
JP4932161B2 (en) * 2005-01-14 2012-05-16 三菱電機株式会社 Viewer information measuring device

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6051980A (en) * 1983-08-31 1985-03-23 Toshiba Corp On-line pattern recognizing device

Also Published As

Publication number Publication date
JPH01121978A (en) 1989-05-15

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